Excavator-bucket (toggle mechanism).



G. H. BRAINARD. EXUAVA'IOB BUCKET (TOGGLB HEOHAHIBH).

Hummm! num mw. a1, nos.

953,020. l r Patented 1m29,` 1910.l

0.1i., BRAINARD. EXGAVATOR BUCKET (TOGGLE HECHANIBH).

y APPLIOATIOI FILED DEU. 31, 1909.

Ptend 1m29, 1910,

CHARLES HENRY BRAINARD, 0F CHICAGO, ILLINOIS.

XCAVATOR-BUCKIET (TOG-GLE MECHANISM).

Specicaton ofLetters Patent.

Patented Mar. 29, 1910.

Application filed Deceniber 31, 1909. Serial No. 535,859.

1b all whom 'it may concern:

Be it known that I, CHARLES HENRY BRAiNARn, a 4citizen of the United States of America,- and a resident of Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Excavator-Buckets, (Toggle Mechanisnn) of which the following is a specification.

The main objects of this invention are to provide an improved scrapei bucket suitable for use in conjunction with a derrick for (.ligging'and transporting gravel, clay, rock and the like; to provide a bucket whereby the dumping operation is in large measure automatic, and whereby the loadinfP and unloading operations may be controlled from the derrick platform by proper manipulation of the hauling` and hoisting lines; to provide a bucket in which theelements for insuring automatic operation are in large measure located `above the bucket and out oi contact with the material on which the work is being done; to provide a device free, in large measure, from pulleys and similar elcn'ients which could become clogged with clay, or choked with rock; and to provide a structure in which a toggle. is used to establish a holding relation between certain elements of the structure, whereby the bucket is dumped only after release of the hauling line.

A specific construction embodying this invention is illustrated in the accompanying drawings in which- Figure l is a side elevation of a com )letc bucket; Fig. 2 is a rear end elevation ot the same; and Fig. 3 illustrates the .mode of operation, indicating in dotted lines several successive positions of a bucket.

In the construction shown, the sheet metal bucket l is provided with trunnions 2 and 3 located back of the centerl of gravity of the bucket. Pivotally connected to the bucket is a bail consistin of right and left halves 4 and 5 connecte together at their tops by a pin G to'which the hoisting line or tackle may be connected.. Trunnions 2 and 3 are each reinforced or braced by an ear 7 riveted to the side of the bucket. The rear end 8 of the bucket is closed, and the cutting edge 9 is located under the over-hanging front of the bucket as shown on the drawin The front of the. bucket is provided with hauling chains 1 ().whereby the bucket may be drawn orI scraped through the soil.

Mounted on the` rear end of the bucket is a standard 11, and between this standard and the hail ot' the bucket extends a, toggle comprising a link 12 pivoted to the standard at its lower end, and pivotally connected at its upper end to two links 13 and lil placed side by side, and both pivotally mounted on a lpin l5 extending between the 'bail arms 4 and vbucket l is a bracket or slop23, serviceable to limit the 'forward movement of the bail.

The operation of the bucket is as :follows: lfVith the bucket in the col'iveying position, as shown in full lines in Fi f. 3, the hauling cable acts through controlling line 18 to keep the toggle from collapsing, thereby holding the bail against the stops 23 and preventing the bucket from dumping. After the bucket has been hoisted and swung to a position near the end of the derrick boom 24, the hauling cable can be released by the operator, thus releasing the toggle and allowing the bucket to tilt forward and dump as shown in dotted lines in Fig. 3. When the bucket is in the dumping position, the

toggle mechanism is folded up at the rear end of the bucket. When the bucket is dropped into the pit for another load, it strikes on its forward end /and then tilts over into` normal digging position. Then when tension is put on the hauling cable, the line 22" swings the bail forward until finally the tog le comes into normal position where it is he d by the controlling line 18. The normal tension on line 18 crowds the bail forward against its stops 23 and pushes down on the standard 11 at the rear of the bucket in such a manner that the bucket can be drawn or scraped along the ground without danger of dlsturbing the rigid relation between the bail and the bucket.

Although but one specific embodiment of this invention is-herein shown, it will be understood that numerous details of the construction shown may be altered or omitted. Without -departing from the spirit of this invention. y I claim.:

.AbaiL a'bucket pivotally mounted. thereon,

' said' .bucket 'to control the tilting of the bucket.

- v2. In an excavator, the combination of a bail, -a bucket pivotally mounted thereon, a

- toggle-connecting said bail tosaid bucket,

a' hauling cable o eratively connected` to 'the front of the4 bucket, and controlling' 15 means for said toggle operative through sain Bflnan excavator,

lthe combination of a' bucket, vmeans for pivotally suiporting said c bucket, a toggle connection etvveen said Vbucket and said Supporting means, vand a .line for 'controlling saidtoggle to' govern 14. nfanexcavator, the combination o a bucketpivoted at a point back of its center apoint back of its-center of gravity, a haullbai l,-a bucket'pivotally mounted thereon at .--ljngcable operatively connected tothe trout J1. In an excavator, the combination oit a y .and a toggle connected between said bail and Y -.of'grav1ty, ahauling cable operatively con-Y y 6.0111 an excavator, the combination of' 'to said bucket,

ried .by the scacco of said bucket, a hoisting cable connected to saicl'bail, a toggle connecting said bail and means controlled through one ci said cables for governing the position oi said toggle.

3. in an excavator, the combination oi a bucket, a bail. iaivfimll?1 mounted thereon, a toggle connecting said bucket to said bail, a hauling cable of eratively connected to the :front of said bue "et, and a controlling line 'connecting said toggle to said hauling cable.

8. n an excavator, 4tbe combination. of a I bucket, a bail. pivotaily mounted thereon,

stops for limiting the forward' movement of said bail toggle connected between said bail and said bucket, a hauling cable operatively connected to tli'e iront of said bucket, and a controlling line operatively connected to said bail and controlled vthrough lsaid 'hauling cableu 9.l in an excavator, the combination of a bail, a. bucket pivoted thereon back of its center of gravity, stops on' said bucket for limiting the forward movement of the bail with respect to the bucket, a standard car rear end of the bucket, a tog gie connected betweensaid standard and said bail, hauling means operatively conneoted to said bucket, a controlling line pass "ing through a guide on tne front end of the bucket and having one end connect-cd to saidftoggle and tbe other end operatively. connected to said `hauling ineens, and aseo ond line connected betweensaid bailjand said lcontrol).ing line.

Signed at Chicago this 24th day of December 1969.

Witnesses:

ieoaii l/lamineren, il nonne A. Ruini/inra,

'crnienne iin-Nar BRAIN ARD. 

